It's more than likely, if it was designed in house, that they rented the fixtures needed, for the relatively short duration of the project.
The lighting for Lightopia, at Christmas, would have been provided by the external company who produced it.
Maybe, although given it appeared as the exact same lights for multiple years that seems an odd decision as I imagine they wouldn’t break the bank.
I’m sure the lightopia lights will pop up somewhere, otherwise administrators have missed a trick